11 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHfailed smog test
Leading reported evidence
Install o2 sensor cheaters
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
I had back in the day a 00' Mustang GT with no cat at all and I still passed because I had installed O2 sensor cheaters.
Leading evidence: 'Install o2 sensor cheaters' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Install o2 sensor cheaters' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Did you run the car hard before arriving to the smog station?
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
11 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261027T154520Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi everyone, I have a 1999 996 with headers, chip, cat bypass, and fabspeed exhaust. Anybody know of a way to get it passed the smog without having to revert everything back? In the Sacramento area?
Thanks
is your Check Engine Light on??
I am not sure about CA but here in MD they only connect the car to their computer, and if the OBD2 system is OK you will pass. I had back in the day a 00' Mustang GT with no cat at all and I still passed because I had installed O2 sensor cheaters. Maybe you could get something like that for your 911
Unles the items have CARB compliance their presence will (should anyhow) cause the car to fail smog simply at the visual inspection stage.
The penalties for trying to sneak cars through that would otherwise fail smog are pretty severe.
In fact, my info is -- about a decade or so out of date -- is that the shop that did the mods for you could be liable as they're not supposed to be applied to a road car, only a vehicle intended for off-road (track) use. Some years ago I approached a shop about custom headers for my car (not a Porsche) and the guy accused me of being an uncover agent for CARB. Seems he was busted for doing custom though non-smog compliant exhaust systems by a I guess CARB sting operation and was paranoid and quite reluctant to risk doing any more. I didn't know that what was asking of him was illegal but as soon as I understood the situation I decided to let the car continue with its stock exhaust system. (I had removed the stock carb and substituted dual side draft Webers, along with installing a hot cam, high-compression pistons, etc.)
Sincerely,
Macster.
Hi Lisa, I just passed smog with my 99 996. It has B&B mufflers and headers plus an EVO cold air induction system. I went to Stewart's Automotive. They specialize in British, Italian, and German cars. I highly recommend them. They are in downtown Sacramento and their phone number is [phone removed]. I'm sure that you will have to put the cats back on to pass. Good luck. Mark.
just curious.... if one had on the 100 cel cats on will it still pass smog with headers and muffler and chip? and does anyone know how good are the Dansk cats? will they throw a cel?
